dffu.dk is a .dk domain served by 2 nameservers (ns.semaphor.dk, ns2.semaphor.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 89.106.200.1 is hosted by Enflow B.V. (AS209626) in The Netherlands. Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns.semaphor.dk | 195.190.25.50 | ns.semaphor.dk | AS201697 Semaphor |
| ns2.semaphor.dk | 85.235.240.108 | ns2.semaphor.dk | AS3308 Norlys Telco A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 89.106.200.1 | 300s | edge.redirect.pizza | AS209626 | Enflow B.V. | 89.106.200.0/24 | 🇳🇱 The Netherlands | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms32551644 |
| v=spf1 include:spf.protection.outlook.com include:_spf.semaphor.dk include:_spf.primero.dk include:sendgrid.net -all |
| vpe=9b46bb3f |
| Policy | Record (dffu.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:_spf.semaphor.dk include:_spf.primero.dk include:sendgrid.net -all |
| Policy | Record (_dmarc.dffu.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www CNAME | dffu-dk.pages.dev (all on pages.dev) |
| www vs bare domain | Different networks dffu.dk: 89.106.200.1 (AS209626) (all like this)www.dffu.dk: 172.66.44.194 172.66.47.62 2606:4700:310c::ac42:2cc2 2606:4700:310c::ac42:2f3e (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u50681571.wl072.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u50681571.wl072.sendgrid.net | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 5/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026082100 |
| Primary NS (MNAME) | ns.semaphor.dk |
| Responsible (RNAME) | hostmaster@semaphor.dk |
| Refresh | 3600s |
| Retry | 3600s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 38400s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 16:17:16 | 1188ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-30 06:48:13 | 1104ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-24 12:40:26 | 1334ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-08-21 16:51:37 shown | 4465ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-28 11:27:25 | 1053ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-20 19:01:36 | 1968ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-17 02:36:14 | 788ms | 2 NS 1 A 4 MX | 🔓 Insecure |